Cant play the game after volume 9 update

Ok, so i managed to fix the F03 error in PC (EA App) and i didnt see this listed anywhere so here it goes: I had to use another computer to install the game at (in my case update the game bc i had it on my laptop) and open the game normally. then i went to online and sold all 0$ cars , DLC and pass cars basically (if you havent, you need to do this in single player too) and then i could join multiplayer normally, in SP garage i have 20~ cars and in MP 80~ , if you are under 100 in SP and MP it should work. I couldnt do that on my main pc bc i wasnt able to sell cars, something with residual files or idk really